With just two months until the midterm elections, the Republican and Democratic parties are kicking campaigns into high gear.For Democrats, the path to the majority appears to run in large part through suburban, well-educated districts where disapproval of President Donald Trump's job performance could be hobbling for GOP candidates. The party believes its prospects have improved as Democratic candidates continue to overperform in special election contests, with the latest example being last month's less than 1 percent loss in a reliably Republican central Ohio district. Trump won that district by 11 points in 2016.One of the biggest races saw Democratic Rep. Mike Capuano -- a 20-year incumbent who was one of the most progressive members of Congress -- against Boston City Councilor Ayanna Pressley, a 44-year-old rising star who argues the party needs new voices to counter Trump. In a shocking upset, Pressley came out of Tuesday's election as the winner. She is now poised to become the only black member of Massachusetts' mostly male congressional delegation.Massachusetts was one of two major tests for Democratic incumbents this week. In Delaware, Sen. Tom Carper faces a challenge Thursday from progressive insurgent Kerri Evelyn Harris. Rhode Island, another state holding primaries in September, is expected to stay solidly blue. With the retirement of Democrat Carol Shea-Porter in New Hampshire’s First Congressional District, the field is wide-open in a district Trump won by just 1 point in 2016. The district itself is a constant toss-up, being represented by both members of both parties for decades. Voters in the Granite State will decide who will represent their parties on Sept. 11. Heading into November, the Republican Party has a handful of incumbents who are running strong races in districts that would be tough in any environment, let alone one where the president's approval rating is stuck in the high 30s or low to mid-40s. The latest ABC News/Washington Post survey showed the president at 36 percent approval and 60 percent disapproval.CNN contributed to this report.

With just two months until the midterm elections, the Republican and Democratic parties are kicking campaigns into high gear.

For Democrats, the path to the majority appears to run in large part through suburban, well-educated districts where disapproval of President Donald Trump's job performance could be hobbling for GOP candidates. The party believes its prospects have improved as Democratic candidates continue to overperform in special election contests, with the latest example being last month's less than 1 percent loss in a reliably Republican central Ohio district. Trump won that district by 11 points in 2016.

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One of the biggest races saw Democratic Rep. Mike Capuano -- a 20-year incumbent who was one of the most progressive members of Congress -- against Boston City Councilor Ayanna Pressley, a 44-year-old rising star who argues the party needs new voices to counter Trump. In a shocking upset, Pressley came out of Tuesday's election as the winner. She is now poised to become the only black member of Massachusetts' mostly male congressional delegation.

Massachusetts was one of two major tests for Democratic incumbents this week. In Delaware, Sen. Tom Carper faces a challenge Thursday from progressive insurgent Kerri Evelyn Harris. Rhode Island, another state holding primaries in September, is expected to stay solidly blue.

With the retirement of Democrat Carol Shea-Porter in New Hampshire’s First Congressional District, the field is wide-open in a district Trump won by just 1 point in 2016. The district itself is a constant toss-up, being represented by both members of both parties for decades. Voters in the Granite State will decide who will represent their parties on Sept. 11.

Heading into November, the Republican Party has a handful of incumbents who are running strong races in districts that would be tough in any environment, let alone one where the president's approval rating is stuck in the high 30s or low to mid-40s. The latest ABC News/Washington Post survey showed the president at 36 percent approval and 60 percent disapproval.